21112231032 has 48 divisors (see below), whose sum is σ = 57225648480. Its totient is φ = 7031664000.

The previous prime is 21112231027. The next prime is 21112231033. The reversal of 21112231032 is 23013221112.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21112230996 and 21112231014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112231033) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30469 + ... + 207732.

It is an arithmetic number, because the mean of its divisors is an integer number (1192201010).

Almost surely, 2^21112231032 is an apocalyptic number.

It is an amenable number.

21112231032 is an abundant number, since it is smaller than the sum of its proper divisors (36113417448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21112231032 is a wasteful number, since it uses less digits than its factorization.

21112231032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239444 (or 239437 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21112231032 its reverse (23013221112), we get a palindrome (44125452144).

The spelling of 21112231032 in words is "twenty-one billion, one hundred twelve million, two hundred thirty-one thousand, thirty-two".